Roller for surfacing machines



Aug. 26, 1930. A. E. CHAPPELL ROLLER FOR SURFACING MACHINES Filed Feb. 5, 1927 (ga/ved@ Patented Aug. 26K, 1930` ARTHUR-E. cHAPrELI,'oF WAUK'GAEILLINQI'S VRotten For;V sURFAcING. MACHINES' Q Animation-mea February 5, 1927. seriaiNo'.-166,081..v

. This invention relates vto surfacing v.rollers of the type wherein the roller is usually covered with a-relatively soft material and is provided with an outer abrasive or polishingV covering of surfacing paper or cloth which rrequires frequent renewal.

Rollers 'of this.. type -are frequently used in connection with machines, suoli as .the-

surfacing machine of my copending application for patent, Serial N o. 164,403 filed J anuary 29, 1927. From the nature of such machines, the accessibility to the rollers is limited, and it is accordingly the primaryr yobject of this invention to provide a'roller of the above type in whichthe outer covering may lbe renewed with a maximum of convenience, even wherey the acccessibility to the roller is limited. While the roller of my invention has particular utility vin connection with the surfacing machine illustrated and described in said copending application, it will be understood that. the inventive features 'of my roller willv bevof advantage to many other types of machine.

Another object is to provide1means for gripping and holding the abrasive or polishing covering, which maybe incorporated and'used in rollers of much smaller diameter than it has heretofore been possible to equip withy any known gripping and holding device. l

It is also an object of this invention to provide a roller of the above type, the abra-y sive or polishing covering of which may be renewed without the exercise of anymechanical skill.

It is further an object 'of this invention to provide a roller of the above type which 'is rugged, simple and efficient. e

vapparent as the same becomes better understood from the description and claims when considered in connection with the accompanying drawings, wherein Fig. l is a horizontal sectionalview with parts in elevation, showing a roller embodyingthis invention, and e Fig. 2 is a vertical section at the line 2-2 of Fig. 1.

Referring to the drawings more particu- Other objects of the invention will become larly, Aasurfacing roller is shown for 4illus'- .trativefpurposes only, the same :being 'the' auxiliary surfacing roller vgenerally described in myv aforesaid copending application, The drive shaft 4 is journaled; insuitable- Lball-,bearings 5 ybetween' the forward vends of arms 6 which form the'secondary'frame (not shown) .i A sprocketwheel 7 iS mountedon the vshaft 4 at' oneside on the roller 3 thereon and is driven, asindicated in said a copending application.l

. The interior of the roller. ,3, becauselof its y small size, is of limited laccessibilitywhich `rendersthe mounting of grippingand holdingqmeans therein a diflicult problem. V`The roller' comprises a hollow cylindricaly drum or shell 9 surrounding the shaft 4 and ysupported thereonby discs or Aends 11, one secured in each` end of saidk drum by' screws 12 and fitting the shaft loosely enough to rotate lrelatively thereto.,` A layer 13 of felt kor `similar soft and resilientmaterial is-secured -to' the outer periphery ofthedrum 9. The

drum 9 and layer 13 thereon are provided Y with a ,longitudinal-,slotvl4 adapted tojkrevvceive the f longitudinal' edges ofthe covering 8 :of :abrasivegor polishing vmaterialj and i ay "fwedgel,V suchl edgesand wedge being directed between the peripheriesof the V.drive Ashaft 4A and a parallel shaft or roll 16 j'ournaled inthe discs.'V The shaft; l6`has`a flat lsided extension 18 thereon, extending out- Wardlyof .one of the discs 11, so that atool :may be y,used-to turn the shaft, thusldrawing the edges of the covering 8 with the wedge lftherebetween inwardly between said shaft, and the drive shaft 4. Screws ,19

on the shaft 4-permit `only a limited amount of relative rotation between-said.- shaft and the roller 3 i p driven by said shaft through Y.the medium of said screws which are adaptedto engage the shaft 16 in one direction anda counterwhereby said roller may be 1 balancing third shaft 21 in :theother direction. The shaft 21`is parallel to the shaft 4 and mounted-in the disc 11 opposite to` theshaft 16. Relative movement being permitted between the shaft 4 and theV roller,

'thelatter may be 4moved sufficiently so that f8, the `drum is lfirst rotated in a counter stead be rigidly connected with the shaft 4, and a sleeve provided on said shaft to facilitate inward movement of said edges and the wedge as the lshaft 16 is turned. n

The roll 16 is provided with a cut-a-way of flat, longitudinal portionvQQ which is normally substantially parallel' to the edges of the covering 8 and the wedge 1,54 to facili-- tate entrance of said edges between the Ashafts'4 and 16. .4s-the roll16 is rotated, the vrest-of the periphery thereof will cam into the edges of lthe covering 8, locking them between theshaft 4 and roll 16.v

` -In the operation of renewing the rcovering clockwise direction, Aviewing Fig. 2,- relatively to the `drum shaft 4 to retract the screws 19 from the-covering. The roll 16 'is then turned in the same direction by a suitable tool to loosen the edges of said 'with said edges.- j The wedge 15 mayf'then be removed,together with the covering 8 and anewcovering applied by projecting its edges thru the slot 14 into the space betweenthe shaft 4 and 'roll 16, the wedge 15 of suitable thicknessV being also simulytaneously inserted. yThe flat face 22 of the roll 16 being opposed to the drive shaft 4 provides ample space' between the shaft and roll toaccommodate the ends of the covering and the wedge. The roll 16 is now again rotated, this time in a clockwise direction, as viewed in Fig. 2 to clamp and lock theedges of thecovering 8 and the wedge betweensaid shaft 4 and roll 16. As the roll 16- is rotated, a slight inward movement l'will be given the edges of the covering 8 which .will be further increased when the shaft 4 rotates relativelytov the drum to bring the screws 19 into engagement with the drum covering when the machine Lis started up.

`It will be observed that' the roller herein described affords a maximum of space economy and is simple and efficient, and that the surfacing cover 8 may be renewed with a maximum of convenience.

- signature.

in said roller in axially spaced parallel relation with respect to said shaft and adapted to cooperate therewith for gripping the edges of said covering, said roller having a longitudinal slot in the periphery thereof adapted to receive said edges.

2. In a surfacing machine, the combinationof a drive shaft, a hollow roller thereon driven by said shaft, a covering of surfacing4 material and a clamping roll journaled within said roller in axially spaced parallel relation with respect to said shaft and adapted t'ocooperate therewith for gripping the edges of vsaid covering, said roller having a longitudinal slot in the periphery thereofgadapted to receive said edges, the roll having a portion of its periphery cut away to facilitate entrance of said edges, the remaining portion of the periphery of said roll being adapted to lock said edges between said shaft and roll. Y c

VIn witness of the. foregoing I afX my ARTHUR n. GHABPELL.

covering and the wedge 15 by bringing Vthe I' -lat portion 22 substantial parallel' relation I am aware that many changes. may be i made throughout a wide range without departing from the principles of this invention, and I therefore do not wish to be limited to what is shown ordescribed herein.

I claim: 1. In a surfacing machine, the

driven by said shaft, a coveringof surfacing icombinai vtion of a drive shaft, a hollow roller thereon 

